/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.jute.compiler;

/**
 *
 */
public class JVector extends JCompType {

	static private int level = 0;

	static private void decrLevel() {
		level--;
	}

	static public String extractVectorName(JType jvType) {
		return JRecord.extractMethodSuffix(jvType) + "_vector";
	}

	static private String getId(String id) {
		return id + getLevel();
	}

	static private String getLevel() {
		return Integer.toString(level);
	}

	static private void incrLevel() {
		level++;
	}

	private JType mElement;

	/** Creates a new instance of JVector */
	public JVector(JType t) {
		super("struct " + extractVectorName(t), " ::std::vector<" + t.getCppType() + ">",
				"System.Collections.Generic.List<" + t.getCsharpType() + ">", "java.util.List<" + t.getJavaType() + ">",
				"Vector", "System.Collections.Generic.List<" + t.getCsharpType() + ">",
				"java.util.ArrayList<" + t.getJavaType() + ">");
		mElement = t;
	}

	String genCsharpReadMethod(String fname, String tag) {
		return genCsharpReadWrapper(fname, tag, false);
	}

	public String genCsharpReadWrapper(String fname, String tag, boolean decl) {
		StringBuilder ret = new StringBuilder("");
		if (decl) {
			ret.append("      System.Collections.Generic.List<" + mElement.getCsharpType() + "> " + capitalize(fname)
					+ ";\n");
		}
		ret.append("    {\n");
		incrLevel();
		ret.append("      IIndex " + getId("vidx") + " = a_.StartVector(\"" + tag + "\");\n");
		ret.append("      if (" + getId("vidx") + "!= null) {");
		ret.append("          " + capitalize(fname) + "=new System.Collections.Generic.List<" + mElement.getCsharpType()
				+ ">();\n");
		ret.append("          for (; !" + getId("vidx") + ".Done(); " + getId("vidx") + ".Incr()) {\n");
		ret.append(mElement.genCsharpReadWrapper(getId("e"), getId("e"), true));
		ret.append("            " + capitalize(fname) + ".Add(" + getId("e") + ");\n");
		ret.append("          }\n");
		ret.append("      }\n");
		ret.append("    a_.EndVector(\"" + tag + "\");\n");
		decrLevel();
		ret.append("    }\n");
		return ret.toString();
	}

	String genCsharpWriteMethod(String fname, String tag) {
		return genCsharpWriteWrapper(fname, tag);
	}

	public String genCsharpWriteWrapper(String fname, String tag) {
		StringBuilder ret = new StringBuilder("    {\n");
		incrLevel();
		ret.append("      a_.StartVector(" + capitalize(fname) + ",\"" + tag + "\");\n");
		ret.append("      if (" + capitalize(fname) + "!= null) {");
		ret.append("          int " + getId("len") + " = " + capitalize(fname) + ".Count;\n");
		ret.append("          for(int " + getId("vidx") + " = 0; " + getId("vidx") + "<" + getId("len") + "; "
				+ getId("vidx") + "++) {\n");
		ret.append("            " + mElement.getCsharpWrapperType() + " " + getId("e") + " = ("
				+ mElement.getCsharpWrapperType() + ") " + capitalize(fname) + "[" + getId("vidx") + "];\n");
		ret.append(mElement.genCsharpWriteWrapper(getId("e"), getId("e")));
		ret.append("          }\n");
		ret.append("      }\n");
		ret.append("      a_.EndVector(" + capitalize(fname) + ",\"" + tag + "\");\n");
		ret.append("    }\n");
		decrLevel();
		return ret.toString();
	}

	public String genJavaCompareTo(String fname) {
		return "    throw new UnsupportedOperationException(\"comparing " + fname + " is unimplemented\");\n";
	}

	public String genJavaReadMethod(String fname, String tag) {
		return genJavaReadWrapper(fname, tag, false);
	}

	public String genJavaReadWrapper(String fname, String tag, boolean decl) {
		StringBuilder ret = new StringBuilder("");
		if (decl) {
			ret.append("      java.util.List " + fname + ";\n");
		}
		ret.append("    {\n");
		incrLevel();
		ret.append("      Index " + getId("vidx") + " = a_.startVector(\"" + tag + "\");\n");
		ret.append("      if (" + getId("vidx") + "!= null) {");
		ret.append("          " + fname + "=new java.util.ArrayList<" + mElement.getJavaType() + ">();\n");
		ret.append("          for (; !" + getId("vidx") + ".done(); " + getId("vidx") + ".incr()) {\n");
		ret.append(mElement.genJavaReadWrapper(getId("e"), getId("e"), true));
		ret.append("            " + fname + ".add(" + getId("e") + ");\n");
		ret.append("          }\n");
		ret.append("      }\n");
		ret.append("    a_.endVector(\"" + tag + "\");\n");
		decrLevel();
		ret.append("    }\n");
		return ret.toString();
	}

	public String genJavaWriteMethod(String fname, String tag) {
		return genJavaWriteWrapper(fname, tag);
	}

	public String genJavaWriteWrapper(String fname, String tag) {
		StringBuilder ret = new StringBuilder("    {\n");
		incrLevel();
		ret.append("      a_.startVector(" + fname + ",\"" + tag + "\");\n");
		ret.append("      if (" + fname + "!= null) {");
		ret.append("          int " + getId("len") + " = " + fname + ".size();\n");
		ret.append("          for(int " + getId("vidx") + " = 0; " + getId("vidx") + "<" + getId("len") + "; "
				+ getId("vidx") + "++) {\n");
		ret.append("            " + mElement.getJavaWrapperType() + " " + getId("e") + " = ("
				+ mElement.getJavaWrapperType() + ") " + fname + ".get(" + getId("vidx") + ");\n");
		ret.append(mElement.genJavaWriteWrapper(getId("e"), getId("e")));
		ret.append("          }\n");
		ret.append("      }\n");
		ret.append("      a_.endVector(" + fname + ",\"" + tag + "\");\n");
		ret.append("    }\n");
		decrLevel();
		return ret.toString();
	}

	public JType getElementType() {
		return mElement;
	}

	public String getSignature() {
		return "[" + mElement.getSignature() + "]";
	}
}
